TWI632349B - Adjustable electrode structures of electromagnetic flowmeter - Google Patents
Adjustable electrode structures of electromagnetic flowmeter Download PDFInfo
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Abstract
本發明係為一種可調整電極結構位置之電磁流量計，量測管體具有安裝管內襯，控制模組安置在量測管體側邊，磁場模組及一對電極結構電性連接控制模組並分別安裝在正交於量測管體相對的外側面與工作流體隔離不接觸，各電極結構部分伸入安裝管內襯，致動元件電性連接控制模組並連接其中一電極結構，致動元件在外部電力驅動下能夠帶動電極結構朝正交於安裝管內襯的內部方向移動，藉此補償電極結構的損耗而得到正確的量測結果，並增加使用壽命。 The invention relates to an electromagnetic flowmeter capable of adjusting the position of an electrode structure. The measuring pipe body has a mounting pipe lining, the control module is disposed on the side of the measuring pipe body, the magnetic field module and the pair of electrode structures are electrically connected to the control mode. The groups are respectively installed on the outer side opposite to the measuring tube body and are not in contact with the working fluid, and the electrode structures partially extend into the mounting tube lining, and the actuating element is electrically connected to the control module and connected to one of the electrode structures. The actuating element can drive the electrode structure to move orthogonally to the inner direction of the mounting tube liner under external electric drive, thereby compensating for the loss of the electrode structure to obtain a correct measurement result and increasing the service life.
Description
本發明係有關於電磁流量計，尤指一種可調整電極結構位置之電磁流量計。 The invention relates to an electromagnetic flowmeter, in particular to an electromagnetic flowmeter capable of adjusting the position of an electrode structure.
電磁流量計係利用電磁感應來量測流經一量測管體內的導電性流體(如水等)之流率。電磁流量計主要是由量測管體、配置在量測管體上的一對電極結構及一對線圈所構成。另外，線圈供電後於量測管體內形成磁場，並與電極結構之間產生電動勢，故能藉由流體通過量測管體時會對磁場產生電動勢的變化，進而計算出流體之流率。 Electromagnetic flowmeters use electromagnetic induction to measure the flow rate of a conductive fluid (such as water) flowing through a measuring tube. The electromagnetic flowmeter is mainly composed of a measuring tube body, a pair of electrode structures arranged on the measuring tube body and a pair of coils. In addition, after the coil is powered, a magnetic field is formed in the measuring tube body, and an electromotive force is generated between the coil and the electrode structure. Therefore, when the fluid passes through the measuring tube body, a change in the electromotive force is generated in the magnetic field, thereby calculating the fluid flow rate.
一般電磁流量計是透過電極結構對管體內的流體進行感測，惟管體內的流體在流動時會對電極結構偵測部造成磨損，因此使用相當時間後，電磁流量計的量測作業可能會發生失效或失準的情形，造成電子訊號的寄生雜訊產生。此外，由於傳統的電磁流量計的金屬殼座大多是利用焊接封合，避免水氣侵入，來確保內部的電極結構和線圈等元件的正常運作，惟此焊接工序造成對金屬殼座內部的電極結構損耗進行更換維修的困難，導致必須關閉管道相關設施以汰換電磁流量計，並造成生產中斷及產能降低，並大幅增加成本。 Generally, the electromagnetic flowmeter senses the fluid in the tube through the electrode structure, but the fluid in the tube body will cause wear to the electrode structure detecting portion when flowing, so after a considerable period of time, the electromagnetic flowmeter may be measured. In the event of failure or misalignment, parasitic noise of the electronic signal is generated. In addition, since the metal housings of the conventional electromagnetic flowmeters are mostly sealed by welding to prevent intrusion of moisture, to ensure the normal operation of the internal electrode structure and components such as coils, the welding process causes electrodes inside the metal housing. The difficulty of replacing and repairing the structural loss has led to the need to close the pipeline-related facilities to replace the electromagnetic flowmeter, resulting in production interruption and capacity reduction, and a substantial increase in cost.
有鑑於此，本發明人遂針對上述現有技術，特潛心研究並配合學理的運用，盡力解決上述之問題點，即成為本發明人改良之目標。 In view of the above, the inventors of the present invention have made great efforts to solve the above problems in view of the above-mentioned prior art, and have made great efforts to solve the above problems, which has become the object of improvement of the present inventors.
本發明之一目的，在於提供一種可調整電極結構位置之電磁流量計，藉此補償電極結構的損耗、調整兩個電極結構的相對位置，使得可以垂直正交的垂直流場流動方向而維持正確的量測結果，降低電子訊號雜訊，以縮短維修時間及簡化工序，並能維持產能和增加電磁流量計的使用壽命。 An object of the present invention is to provide an electromagnetic flowmeter capable of adjusting the position of an electrode structure, thereby compensating for the loss of the electrode structure and adjusting the relative positions of the two electrode structures so that the vertical flow field of the vertical orthogonal flow can be maintained correctly. The measurement results reduce electronic signal noise to reduce repair time and simplify processes, and maintain capacity and increase the life of the electromagnetic flowmeter.
為了達成上述之目的，本發明係為一種可調整電極結構位置之電磁流量計，包括量測管體、控制模組、磁場模組、一對電極結構及至少一致動元件。量測管體具有安裝管內襯，控制模組安置在量測管體側邊，磁場模組電性連接控制模組並安裝在正交於量測管體的相對的第一外側方向與工作流體隔離不接觸，該對電極結構電性連接控制模組並對應配置在正交於量測管體相對的第二外側方向與工作流體隔離不接觸。各電極結構部分伸入安裝管內襯，致動元件電性連接控制模組並連接其中一電極結構，致動元件在外部電力驅動下能夠帶動電極結構朝正交於安裝管內襯的內部方向移動。 In order to achieve the above object, the present invention is an electromagnetic flowmeter capable of adjusting the position of an electrode structure, comprising a measuring tube body, a control module, a magnetic field module, a pair of electrode structures and at least an actuating element. The measuring pipe body has a mounting pipe lining, the control module is disposed on the side of the measuring pipe body, and the magnetic field module is electrically connected to the control module and installed in an opposite first outer direction orthogonal to the measuring pipe body and works The fluid isolation is not in contact, and the pair of electrode structures are electrically connected to the control module and are disposed in contact with the working fluid in a direction opposite to the second outer side of the measuring tube body. Each electrode structure portion extends into the mounting tube lining, and the actuating element is electrically connected to the control module and is connected to one of the electrode structures. The actuating element can drive the electrode structure to be orthogonal to the inner direction of the mounting tube lining under external electric driving. mobile.
相較於習知，本發明之致動元件係電性連接控制模組及電極結構，且致動元件透過控制模組的控制而在外部電力驅動下能夠帶動電極結構朝正交於安裝管內襯的內部方向移動，藉以補償電極結構的損耗，進而得到正確的量測結果及使用壽命；又，由於本發明可視實際使用情況而分別對量測管體二側電極結構的位置進行調整，更增加靈活運用性。 Compared with the prior art, the actuating component of the present invention is electrically connected to the control module and the electrode structure, and the actuating component can drive the electrode structure to be orthogonal to the mounting tube under external electric driving through the control of the control module. The inner direction of the lining moves to compensate for the loss of the electrode structure, thereby obtaining the correct measurement result and the service life. Moreover, since the present invention can adjust the position of the electrode structure on both sides of the measuring tube body according to the actual use situation, Increase flexibility.
1‧‧‧電磁流量計 1‧‧‧Electromagnetic flowmeter
10‧‧‧量測管體 10‧‧‧Measurement tube body
11‧‧‧安裝管內襯 11‧‧‧Installation tube lining
12‧‧‧安裝管 12‧‧‧Installation tube
13‧‧‧安裝部 13‧‧‧Installation Department
14‧‧‧塞蓋 14‧‧‧Segai
15‧‧‧限位座 15‧‧‧Limited seat
151‧‧‧定位部 151‧‧‧ Positioning Department
1511‧‧‧斜導面 1511‧‧‧ oblique guide
1512‧‧‧平擋面 1512‧‧ ‧ flat surface
20‧‧‧控制模組 20‧‧‧Control Module
21‧‧‧導線 21‧‧‧Wire
30‧‧‧磁場模組 30‧‧‧ magnetic field module
300‧‧‧第一外側方向 300‧‧‧ first lateral direction
40‧‧‧電極結構 40‧‧‧Electrode structure
400‧‧‧第二外側方向 400‧‧‧second outer direction
41‧‧‧電極探棒 41‧‧‧Electrode probe
42‧‧‧承載板 42‧‧‧Bearing board
421‧‧‧平貼面 421‧‧ ‧ flat veneer
422‧‧‧斜面 422‧‧‧Bevel
50‧‧‧致動元件 50‧‧‧Actuating element
60‧‧‧保護殼座 60‧‧‧ protective housing
61‧‧‧第一殼座 61‧‧‧ first housing
62‧‧‧第二殼座 62‧‧‧Second housing
70‧‧‧鎖固元件 70‧‧‧Locking components
A‧‧‧夾角 A‧‧‧ angle
圖1係本發明之可調整電極結構位置之電磁流量計的立體分解示意圖。 1 is a perspective exploded view of an electromagnetic flowmeter of the present invention with adjustable electrode structure positions.
圖2係本發明之可調整電極結構位置之電磁流量計的立體外觀示意圖。 2 is a schematic perspective view of the electromagnetic flowmeter of the adjustable electrode structure position of the present invention.
圖3係為圖2中沿3-3線的剖視圖。 Figure 3 is a cross-sectional view taken along line 3-3 of Figure 2.
圖4係本發明之電磁流量計之安裝部的組合剖視圖。 Fig. 4 is a cross-sectional view showing the assembly of the mounting portion of the electromagnetic flowmeter of the present invention.
圖5係本發明之電磁流量計之電極結構位置調整示意圖。 Fig. 5 is a schematic view showing the position adjustment of the electrode structure of the electromagnetic flowmeter of the present invention.
圖6係為圖2中沿6-6線的剖視圖。 Figure 6 is a cross-sectional view taken along line 6-6 of Figure 2.
有關本發明之詳細說明及技術內容，配合圖式說明如下，然而所附圖式僅提供參考與說明用，並非用來對本發明加以限制者。 The detailed description and technical content of the present invention are set forth in the accompanying drawings.
請參照圖1至圖3，係分別為本發明之可調整電極結構位置之電磁流量計的立體分解示意圖、立體外觀示意圖及其一側方向的剖視圖。本發明可調整電極結構位置之電磁流量計1係包括一量測管體10、一控制模組20、一磁場模組30、一對電極結構40以及至少一致動元件50。該磁場模組30及該對電極結構40分別固定在該量測管體10相對的二側面。又，該控制模組20係控制該磁場模組30、該對電極結構40及該致動元件50。據此，該電磁流量計1可對該量測管體10內的流體進行流速量測，並可透過該致動元件50的驅動來調整該對電極結構40伸入該量測管體10中的距離。更詳細描述該電磁流量計1的結構如後。 1 to 3 are respectively a perspective exploded view, a schematic perspective view, and a cross-sectional view of one side of the electromagnetic flowmeter of the adjustable electrode structure position of the present invention. The electromagnetic flowmeter 1 for adjusting the position of the electrode structure of the present invention comprises a measuring tube body 10, a control module 20, a magnetic field module 30, a pair of electrode structures 40 and at least an actuating element 50. The magnetic field module 30 and the pair of electrode structures 40 are respectively fixed on opposite sides of the measuring tube body 10. Moreover, the control module 20 controls the magnetic field module 30, the pair of electrode structures 40, and the actuating element 50. Accordingly, the electromagnetic flowmeter 1 can measure the flow rate of the fluid in the measuring tube body 10, and can adjust the pair of electrode structures 40 to extend into the measuring tube body 10 through the driving of the actuating member 50. the distance. The structure of the electromagnetic flowmeter 1 will be described in more detail as follows.
如圖1所示，該量測管體10具有可供一工作流體流動的一安裝管內襯11；該控制模組20安置在該量測管體10的一側邊。又，該磁場模組30電性連接該控制模組20並安裝在正交於該量測管體10相對的一第一外側方向300與工作流體隔離不接觸。該磁場模組30透過該控制模組20的控制而受到一外部電力 驅動時能夠在該安裝管內襯11中產生一電磁場。於本實施例中，該磁場模組30係為一對磁性片。 As shown in FIG. 1, the measuring tube body 10 has a mounting tube liner 11 for a working fluid flow; the control module 20 is disposed at one side of the measuring tube body 10. Moreover, the magnetic field module 30 is electrically connected to the control module 20 and mounted in a first outer direction 300 orthogonal to the measuring tube body 10 so as not to be in contact with the working fluid. The magnetic field module 30 receives an external power through the control of the control module 20 An electromagnetic field can be generated in the mounting tube liner 11 during driving. In the embodiment, the magnetic field module 30 is a pair of magnetic sheets.
再者，該對電極結構40電性連接該控制模組20並對應配置在正交於該量測管體10相對的一第二外側方向400與工作流體隔離不接觸，且各該電極結構40係部分伸入該安裝管內襯11以接觸該工作流體。又，該致動元件50電性連接該控制模組20並連接其中一電極結構40。該致動元件50透過該控制模組20的控制而在一外部電力驅動下能夠帶動該其中一電極結構40朝正交於該安裝管內襯11的內部方向移動，藉以補償該電極結構40的損耗，進而得到正確的量測結果。 In addition, the pair of electrode structures 40 are electrically connected to the control module 20 and correspondingly disposed in a second outer direction 400 orthogonal to the measuring tube body 10, and are not in contact with the working fluid, and each of the electrode structures 40 The portion extends into the mounting tube liner 11 to contact the working fluid. Moreover, the actuating component 50 is electrically connected to the control module 20 and connected to one of the electrode structures 40. The actuating element 50 can be driven by the control module 20 to drive the one of the electrode structures 40 to move orthogonally to the inner direction of the mounting tube liner 11 under an external electric drive, thereby compensating the electrode structure 40. Loss, and then get the correct measurement results.
要說明的是，上述該第一外側方向300與該第二外側方向400係在工作流體流動方向之正交平面上形成一個夾角A，該夾角A不以90直角為限制。 It should be noted that the first outer direction 300 and the second outer direction 400 form an angle A on an orthogonal plane of the working fluid flow direction, and the angle A is not limited by 90 right angles.
請參照圖3，於本發明的一實施例中，該量測管體10更包括套合在該安裝管內襯11外的一安裝管12。又，該安裝管12具有相對設置的二安裝部13，該二安裝部13分別具有連通該安裝管內襯11的一貫孔。該對電極結構40對應設置在該二安裝部13中並穿過該貫孔而伸入該安裝管內襯11。 Referring to FIG. 3, in an embodiment of the invention, the measuring tube body 10 further includes a mounting tube 12 that fits outside the mounting tube liner 11. Moreover, the mounting tube 12 has two mounting portions 13 disposed opposite each other, and the two mounting portions 13 respectively have a constant hole communicating with the mounting tube liner 11. The pair of electrode structures 40 are correspondingly disposed in the two mounting portions 13 and extend through the through holes to extend into the mounting tube liner 11 .
再者，各該電極結構40具有一電極探棒41及圈繞在該電極探棒41之外緣面的一承載板42。該致動元件50係設置在該承載板42上。另外，該量測管體10更包括對應蓋合該二安裝部13的二塞蓋14及成型在該安裝部13中的一限位座15。該限位座15係連接該安裝管內襯11並設置有該貫孔。更詳細地說，該對電極結構40係分別連接有一致動元件50；又，該控制模組20更包括一導線21，該致動元件50透過該導線21的連接而受該控制模組20的控制，進而帶動所連接的電極結構40移動。 Furthermore, each of the electrode structures 40 has an electrode probe 41 and a carrier plate 42 wound around the outer edge of the electrode probe 41. The actuating element 50 is disposed on the carrier plate 42. In addition, the measuring tube body 10 further includes a second plug cover 14 corresponding to the two mounting portions 13 and a limiting seat 15 formed in the mounting portion 13 . The limiting seat 15 is connected to the mounting tube liner 11 and is provided with the through hole. In more detail, the pair of electrode structures 40 are respectively connected with the actuating element 50; further, the control module 20 further includes a wire 21, and the actuating element 50 is received by the control module 20 through the connection of the wire 21. The control, in turn, drives the connected electrode structure 40 to move.
本實施例中，該電磁流量計1更包括一保護殼座60及複數鎖固元件70。該保護殼座60係連接該控制模組20並罩合在該量測管體10外。具體而言，該保護殼座60包括相互罩合的一第一殼座61及一第二殼座62，該第一殼座61及該第二殼座62係透過該些鎖固元件70而對應結合在該量測管體10上。 In this embodiment, the electromagnetic flowmeter 1 further includes a protective housing 60 and a plurality of locking components 70. The protective housing 60 is connected to the control module 20 and covers the outside of the measuring tube body 10. Specifically, the protective housing 60 includes a first housing 61 and a second housing 62. The first housing 61 and the second housing 62 pass through the locking components 70. Correspondingly bonded to the measuring tube body 10.
請續參照圖4及圖5，係分別為本發明之電磁流量計之安裝部的組合剖視圖及電極結構位置調整示意圖。如圖4所示，於本實施例中，較佳地，該致動元件50為一壓電元件組合。又，該壓電元件組合的二側係分別抵接該塞蓋14及該承載板42，且該壓電元件組合，係由習知的壓電材料與陶瓷絕緣材料堆疊組成的組合結構，會受外部電力驅動而產生形變，並推動該承載板42而令該其中一電極結構40朝該安裝管內襯11的內部方向移動，藉此達到調整電極結構40位置的目的。 4 and FIG. 5 are respectively a cross-sectional view of the mounting portion of the electromagnetic flowmeter of the present invention and a schematic diagram of the position adjustment of the electrode structure. As shown in FIG. 4, in the embodiment, preferably, the actuating element 50 is a piezoelectric element combination. Moreover, the two sides of the piezoelectric element combination respectively abut the plug cover 14 and the carrier plate 42, and the piezoelectric element combination is a combination structure of a conventional piezoelectric material and a ceramic insulating material. The deformation is caused by external electric power, and the carrier plate 42 is pushed to move the one electrode structure 40 toward the inner direction of the mounting tube liner 11, thereby achieving the purpose of adjusting the position of the electrode structure 40.
要說明的是，於本實施例中，該限位座15的內壁面具有複數定位部151，且該承載板42受該致動元件50的驅動而定位在其中一定位部151上。該些定位部151的設置可保持該承載板42及該限位座15之間的密合性，並防止該承載板42朝遠離該安裝管內襯11的方向移動。 It should be noted that, in this embodiment, the inner wall surface of the limiting seat 15 has a plurality of positioning portions 151, and the carrier plate 42 is driven by the actuating member 50 to be positioned on one of the positioning portions 151. The positioning portions 151 are arranged to maintain the adhesion between the carrier plate 42 and the limiting seat 15 and prevent the carrier plate 42 from moving away from the mounting tube liner 11 .
具體而言，該定位部151為一倒勾，該承載板42在鄰靠該定位部151的一側具有一平貼面421及一斜面422；又，該倒勾具有對應該斜面422設置的一斜導面1511及可貼抵該承載板42的一平擋面1512。進一步地，當該承載板42受該致動元件50的帶動而朝該限位座15的內底部移動時，該承載板42的斜面422會沿著該斜導面1511的引導而朝內側的另一定位部151移動，使該承載板42的平貼面421能定位在內側定位部151的平擋面1512上，據此調整該電極結構40伸入該安裝管內襯11的位置。 Specifically, the positioning portion 151 is a barb. The carrier 42 has a flat surface 421 and a slope 422 on a side adjacent to the positioning portion 151. The barb has a corresponding surface 422. The inclined guiding surface 1511 and a flat surface 1512 that can abut against the carrying plate 42. Further, when the carrying plate 42 is moved by the actuating member 50 toward the inner bottom of the limiting seat 15, the inclined surface 422 of the carrying plate 42 is directed inward along the guiding of the inclined guiding surface 1511. The other positioning portion 151 is moved so that the flat surface 421 of the carrier plate 42 can be positioned on the flat surface 1512 of the inner positioning portion 151, thereby adjusting the position of the electrode structure 40 into the mounting tube liner 11.
請參照圖5，當該壓電元件組合會受外部電力驅動時即產生形變，進而推抵該承載板42朝該量測管體10的中心方向移動。此時，該承載板42會受到該壓電元件組合的推抵而朝該限位座15的內底部移動，並定位在另一較內側的定位部151上。因此，該電極結構40(該電極探棒41及該承載板42)即朝該安裝管內襯11的內部方向移動而改變在該安裝管內襯11中的位置，進而達到調整該電極結構40位置的目的。 Referring to FIG. 5, when the piezoelectric element assembly is driven by external electric power, deformation occurs, and the carrier plate 42 is pushed against the center of the measuring tube body 10. At this time, the carrier plate 42 is pushed against the inner bottom of the limiting seat 15 by the pushing of the piezoelectric element assembly, and is positioned on the other inner positioning portion 151. Therefore, the electrode structure 40 (the electrode probe 41 and the carrier plate 42) moves toward the inner direction of the mounting tube liner 11 to change the position in the mounting tube liner 11, thereby adjusting the electrode structure 40. The purpose of the location.
請另參照圖6，係為本發明之電磁流量計之電極結構位置移動的示意圖。於本實施例中，該量測管體10二側的電極結構40分別連接一致動元件50(壓電元件組合)，且該二致動元件50受該控制模組20的控制而帶動所連接的電極結構40移動。 Please refer to FIG. 6 as a schematic diagram of the positional movement of the electrode structure of the electromagnetic flowmeter of the present invention. In this embodiment, the electrode structures 40 on the two sides of the measuring tube body 10 are respectively connected to the actuating element 50 (piezoelectric element combination), and the two actuating elements 50 are connected by the control module 20 to be connected. The electrode structure 40 moves.
當該對電極結構40受損耗而發生量測失誤或不準確的情況下，本發明之電磁流量計1可透過該控制模組20控制該二致動元件50的驅動，以達到調整該對電極結構40伸入該量測管體10的位置。實際使用時，可視實際使用情況來分別調整該對電極結構40的位置，更增加本發明之電磁流量計1的靈活運用性及使用壽命。 When the pair of electrode structures 40 are subjected to measurement errors or inaccuracies, the electromagnetic flowmeter 1 of the present invention can control the driving of the two actuating elements 50 through the control module 20 to adjust the pair of electrodes. The structure 40 extends into the position of the measuring tube body 10. In actual use, the position of the pair of electrode structures 40 can be individually adjusted according to actual use conditions, and the flexibility and service life of the electromagnetic flowmeter 1 of the present invention are further increased.
以上所述僅為本發明之較佳實施例，非用以定本發明之專利範圍，其他運用本發明之專利精神之等效變化，均應俱屬本發明之專利範圍。 The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and other equivalent variations of the patent spirit of the present invention are all within the scope of the invention.
Claims (11)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106127178A TWI632349B (en) | 2017-08-10 | 2017-08-10 | Adjustable electrode structures of electromagnetic flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| TW106127178A TWI632349B (en) | 2017-08-10 | 2017-08-10 | Adjustable electrode structures of electromagnetic flowmeter |
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| TW201910732A TW201910732A (en) | 2019-03-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7587947B1 (en) * | 2009-01-21 | 2009-09-15 | Murray F Feller | Magnetic flow meter with selective electrode positioning |
| US8434371B2 (en) * | 2010-10-14 | 2013-05-07 | Brickhouse Innovations, Llc | Electromagnetic fluid velocity sensor with adjustable electrodes |
| TWM502830U (en) * | 2015-03-18 | 2015-06-11 | Finetek Co Ltd | Electromagnetic flow meter assembly structure |
| TWI509226B (en) * | 2014-08-13 | 2015-11-21 | Finetek Co Ltd | Electromagnetic Flowmeter with Frequency Conductivity-Sensing Function |
| TWI513956B (en) * | 2013-04-08 | 2015-12-21 | Smc Corp | Electromagnetic flowmeter |
-
2017
- 2017-08-10 TW TW106127178A patent/TWI632349B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7587947B1 (en) * | 2009-01-21 | 2009-09-15 | Murray F Feller | Magnetic flow meter with selective electrode positioning |
| US8434371B2 (en) * | 2010-10-14 | 2013-05-07 | Brickhouse Innovations, Llc | Electromagnetic fluid velocity sensor with adjustable electrodes |
| TWI513956B (en) * | 2013-04-08 | 2015-12-21 | Smc Corp | Electromagnetic flowmeter |
| TWI509226B (en) * | 2014-08-13 | 2015-11-21 | Finetek Co Ltd | Electromagnetic Flowmeter with Frequency Conductivity-Sensing Function |
| TWM502830U (en) * | 2015-03-18 | 2015-06-11 | Finetek Co Ltd | Electromagnetic flow meter assembly structure |
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| TW201910732A (en) | 2019-03-16 |
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